New Bioenergy Study Findings Reported from Agriculture and Agri-Food Canada (Pretreatment and fractionation of barley straw using steam explosion at low severity factor)
By a News Reporter-Staff News Editor at Energy Weekly News -- A new study on Bioenergy is now available. According to news reporting from Saskatoon, Canada, by VerticalNews journalists, research stated, "Agricultural residues represent an abundant, readily available, and inexpensive source of renewable lignocellulosic biomass. However, biomass has complex structural formation that binds cellulose and hemicellulose."
The news correspondents obtained a quote from the research from Agriculture and Agri-Food Canada, "This necessitates the initial breakdown of the lignocellulosic matrix. Steam explosion pretreatment was performed on barley straw grind to assist in the deconstruction and disaggregation of the matrix, so as to have access to the cellulose and hemicellulose. The following process and material variables were used: temperature (140-180 degrees C), corresponding saturated pressure (500-1100 kPa), retention time (5-10 min), and mass fraction of water 8-50%. The effect of the pretreatment was assessed through chemical composition analysis. The severity factor R-o, which combines the temperature and time of the hydrolytic process into a single reaction ordinate was determined. To further provide detailed chemical composition of the steam exploded and non-treated biomass, ultimate analysis was performed to quantify the elemental components. Data show that steam explosion resulted in the breakdown of biomass matrix with increase in acid soluble lignin. However, there was a considerable thermal degradation of cellulose and hemicellulose with increase in acid insoluble lignin content. The high degradation of the hemicellulose can be accounted for by its amorphous nature which is easily disrupted by external influences unlike the well-arranged crystalline cellulose."
According to the news reporters, the research concluded: "The carbon content of the solid steam exploded product increased at higher temperature and longer residence time, while the hydrogen and oxygen content decreased, and the higher heating value (HHV) increased."
For more information on this research see: Pretreatment and fractionation of barley straw using steam explosion at low severity factor. Biomass & Bioenergy, 2014;66():286-300. Biomass & Bioenergy can be contacted at: Pergamon-Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England. (Elsevier - www.elsevier.com; Biomass & Bioenergy - www.elsevier.com/wps/product/cws_home/986)
Our news journalists report that additional information may be obtained by contacting K.L. Iroba, Agr & Agri Food Canada, Saskatoon Res Center, Saskatoon, SK S7N 0X2, Canada. Additional authors for this research include L.G. Tabil, S. Sokhansanj and T. Dumonceaux.
Keywords for this news article include: Saskatoon, Saskatchewan, Canada, North and Central America, Bioenergy
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